I got a bike mounting BAFANG BBSHD mid-drive, I would like to add a LED bulb in front of it for using the bike at night, but there are only 2 cables coming out from the controller (+6V and GND), so I would need to find a LED bulb that only requires 6V to operate, has the lowest possible Watt consumption, lowest operating temperature and highest possible Lumen.

I was looking for LED Bulbs mounting some CREE leds but everything I found was beyond the 6V I'm looking for.

Could anyone please help me in my research? Thank you in advance to anyone willing to contribute.